Oil-well tool



(Model.) l l M. BLUMENTHAL 8v H. KINTZ.

OIL WELL TOOL.

Patented Jan.` 5, 1897.

C im??? w UNITED STATES PATENT OFFICE.

MAX BLUMENTHAL AND HERBERT KINTZ,I OF SHARPSBURG, PENNSYLVANIA.

OIL-WELL TOOL.

SPECIFIGATIONvforming part of Letters Patent No. 574,705, dated January5, 1897'. Application filed February 15, 1896. Serial No. 579,451.(Model.)

To all whom t may concern:

Be it known that we, MAX BLUMENTHAL and HERBERT KINTZ, citizens of theUnited States, residing at Sharpsburg, in the county of Allegheny andState of Pennsylvania, have invented certain new and useful Improvementsin Oil-W'ell Tools; and we do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

The object of our invention is to provide an attachment to oil-welldrills whereby in the event of breakage all the parts of the tool may bewithdrawn from the well.

In the accompanying drawings, Figure lis a side elevation of an oil-welldrill embodying our invention, and Fig. 2 is a longitudinal section ofthe same.

Similar letters of reference indicate similar parts in the respectivefigures.

A represents the stem; B, the bit; C, the rope-socket, and D the jars.The bit is screwed into the lower end of the stem, as indicated at b.

In practice it has been found that breaks usually occur at the jars orat the joint between the stem and the bit. In drills of t-he ordinaryconstruction that part of the tool below the break will fall to thebottom of the well, and great difficulty is often experienced inwithdrawing it from the well. To avoid this difculty, we provide thetool with two casings E and F, one inclosing the jars D and the otherthe joint between the bit and the stem. The casing E is secured at itsupper end to the rope-socket C and is free to have a reciprocatingmovement on the stem A at least equal to the play of the jars D. Asshown in the drawings, the casing E is shown connected to therope-socket C by means of a pin c passing through them, but they may beconnected by any other suitable means. The casing E is provided with aninterior shoulder e near its lower end and the stem A with an exteriorshoulder a a short distance below the jars D. As the casing E can slideupwardly on the stem A itis obvious that should the jars D break thecasing E would be drawn upwardly with the rope-socket C and slide overthe stem Auntil the shoulders ct and e lock, when the stem A would movewith them.

The casing F is provided at its lower end with downwardly-extending earsf f, which are connected to the bit by a pin f. The stem A is providedwith an exterior shoulder d just above the joint with the bit B, and thecasing F is provided with an interior shoulder f2 near its upper end. Itis obvious that should a break occur at the joint between the bit andthe stem the latter will be free to slide upwardly within the casing Funtil the shoulders d and f2 lock, when the stem, casing, and bit willmove upwardly together.

In order that the operator may be quickly warned of a break in the tool,and to prevent further damage, we provide the stem A within the casingsE and F with a series of teeth g, and the casings are provided withpawls h,

adapted to engage the teeth g. These teeth and pawls are arranged, asshown 1n the drawings, to permit the casing E to move upwardly on thestem A, but not downwardly, and the stem A to move upwardly in thecasing F, but not downwardly.

From the foregoing description it is evident that should a break occurat the joint between the stem and either of its members (the ropesocketor the bit) the entire tool can still be withdrawn from the well bymeans of the casings which are connected to the members and the lockingdevices on the casings aud the stem; also, that in the event of a breakat either joint the operator would be quickly made aware of the fact,for the reason that the parts above the break, while free to moveupwardly, can have no downward movement.

Having described ourinvention, we claiml. In an oil-well drill, thecombination with the stem and a member connected thereto, said stemhaving an exterior shoulder near the joint with the member, of a casingin closing said joint and secured at one end to the member and providedwith an interior shoulder near its free end to engage the shoulder onthe stem in the event of a break at the joint, substantially as and forthe purpose specified. y

2. In an oil-well drill, the combination with the stem and a memberconnected thereto,

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said stem being provided with teeth, of a casing Connected to the memberand extending over the joint between the member and stem, devices on thestem and casing' to lock them together in the event of a break at'saidjoint, and a pawl on the casing to engage the teeth on the stem,substantially as and for the purpose specified.

3. In an oil-Well drill, the combination with the stem, the rope-socketand the jars, of a casing connected to the rope-socket and eX- tendingover the stem below the jars, said casing being free to have areciprocating movement on the stem equal to the play of the jars, anddevices on the casing and stem to lock them together in the event 0f abreak at said jars7 substantially as and for the purpose specified.

4. In an oil-well drill, the Combination with the stem, the rope-socketand the jars, said stem having teeth below the jars, of a casing,rconnected to the rope-socket and 'extending over the lstein below thejars, said casing being free to have a reciprocating movement on thestem equal to the play of the jars, devices on the stern and casing tolock them together in the event of a break at said jars, and a pawl onthe casing to engage the teeth 0n the stem when the jars break andpermit upward but prevent downward movement of the casing on the stem,substantially as and for the purpose specified.

In testimony whereof we affix our signatures in presence of twowitnesses.

MAX BLUMENTHAL. HERBERT KIN TZ. Tit-nesses:

XVM. EVANS, R. S. DOUNZEKER.

